IPC Section 383: Extortion

Whoever intentionally puts any person in fear of any injury to that person, or to any other, and thereby dishonestly induces the person so put in fear to deliver to any person any property, or valuable security or anything signed or sealed which may be converted into a valuable security, commits "extortion".
Illustrations
(a) A threatens to publish a defamatory libel concerning Z unless Z gives him money. He thus induces Z to give him money. A has committed extortion.
(b) A threatens Z that he will keep Z's child in wrongful confinement, unless Z will sign and deliver to A a promissory note binding Z to pay certain monies to A. Z sign and delivers the note. A has committed extortion.
(c) A threatens to send club-men to plough up Z's field unless Z will sign and deliver to B a bond binding Z under a penalty to deliver certain produce to B, and thereby induces Z to sign and deliver the bond. A has committed extortion.
(d) A, by putting Z in fear of grievous hurt, dishonestly induces Z to sign or affix his seal to a blank paper and deliver it to A. Z sign and delivers the paper to A. Here, as the paper so signed may be converted into a valuable security. A has committed extortion.